mirror of
https://gitee.com/zlgopen/awtk.git
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138 lines
3.9 KiB
C
138 lines
3.9 KiB
C
/**
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* File: demo_canvas_offline.c
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* Author: AWTK Develop Team
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* Brief: demo_canvas_offline
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*
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* Copyright (c) 2018 - 2020 Guangzhou ZHIYUAN Electronics Co.,Ltd.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* License file for more details.
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*
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*/
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/**
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* History:
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* ================================================================
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* 2020-07-10 Luo Zhiming <luozhiming@zlg.cn> created
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*
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*/
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#include "awtk.h"
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#include "ext_widgets.h"
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#include "base/canvas_offline.h"
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static canvas_t* canvas_offline = NULL;
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#include "vg_common.inc"
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static ret_t on_paint_vgcanvas(void* ctx, event_t* e) {
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#ifndef AWTK_WEB
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paint_event_t* evt = paint_event_cast(e);
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/* 设置离线的 canvas 为当前绘图的画布 */
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canvas_t* c = canvas_offline;
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/* 获取离线的 canvas 对应的离线 bitmap */
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bitmap_t* offline_bitmap = canvas_offline_get_bitmap(canvas_offline);
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/* 开始离线 canvas 绘图 */
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canvas_offline_begin_draw(canvas_offline);
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/*
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* 下面绘图的内容是 demoui 中的 vgcanvas 的内容,
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* 只不过这一部分内容绘图到离线的 canvas 中
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*/
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vgcanvas_t* vg = canvas_get_vgcanvas(c);
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vgcanvas_save(vg);
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vgcanvas_set_fill_color(vg, color_init(0xf0, 0xf0, 0xf0, 0xff));
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vgcanvas_rounded_rect(vg, 0, 0, canvas_offline->lcd->w, canvas_offline->lcd->h, 0);
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vgcanvas_fill(vg);
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vgcanvas_translate(vg, c->ox, c->oy);
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vgcanvas_set_line_width(vg, 1);
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vgcanvas_set_stroke_color(vg, color_init(0, 0xff, 0, 0xff));
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vgcanvas_set_fill_color(vg, color_init(0xff, 0, 0, 0xff));
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draw_basic_shapes(vg, FALSE);
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vgcanvas_translate(vg, 0, 50);
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draw_basic_shapes(vg, TRUE);
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vgcanvas_translate(vg, 0, 50);
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stroke_lines(vg);
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vgcanvas_translate(vg, 0, 50);
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draw_image(vg);
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vgcanvas_translate(vg, 50, 100);
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draw_matrix(vg);
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vgcanvas_translate(vg, 0, 100);
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draw_text(vg);
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vgcanvas_restore(vg);
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/* 结束离线 canvas 绘图 */
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canvas_offline_end_draw(canvas_offline);
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/* 把显存中的 bitmap 显示到在线的 canvas 中 */
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rect_t r = rect_init(0, 0, offline_bitmap->w, offline_bitmap->h);
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canvas_draw_image_ex(evt->c, offline_bitmap, IMAGE_DRAW_DEFAULT, &r);
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#endif /*AWTK_WEB*/
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return RET_OK;
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}
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static ret_t on_snapshot(void* ctx, event_t* e) {
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bitmap_t* offline_bitmap = NULL;
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#ifndef AWTK_WEB
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/* 开始离线 canvas 绘图 */
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canvas_offline_begin_draw(canvas_offline);
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/* 把整个窗口绘制到离线的 canvas 中 */
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widget_paint(window_manager(), canvas_offline);
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/* 结束离线 canvas 绘图 */
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canvas_offline_end_draw(canvas_offline);
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/* 由于需要把 bitmap 保存为 png 文件,所以需要把显存中的数据回传到内存中 */
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canvas_offline_flush_bitmap(canvas_offline);
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/* 获取离线的 canvas 对应的离线 bitmap */
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offline_bitmap = canvas_offline_get_bitmap(canvas_offline);
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/* 把 bitmap 保存到 png 文件 */
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bitmap_save_png(offline_bitmap, "test.png");
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#endif /*AWTK_WEB*/
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return RET_OK;
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}
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ret_t application_init() {
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widget_t* win = window_create(NULL, 0, 0, 0, 0);
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widget_t* canvas_widget = canvas_widget_create(win, 0, 0, win->w, win->h);
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widget_t* button = button_create(win, 0, 0, 0, 0);
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widget_set_self_layout_params(button, "c", "b", "100", "40");
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/* 创建离线的 canvas */
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canvas_offline = canvas_offline_create(320, 480, BITMAP_FMT_RGBA8888);
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widget_set_style_color(win, "bg_color", 0xff00ff00);
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widget_on(canvas_widget, EVT_PAINT, on_paint_vgcanvas, NULL);
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widget_on(button, EVT_CLICK, on_snapshot, NULL);
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widget_set_text_utf8(button, "snapshot");
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return RET_OK;
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}
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ret_t application_exit() {
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/* 释放离线 canvas */
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canvas_offline_destroy(canvas_offline);
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log_debug("application_exit\n");
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return RET_OK;
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}
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#ifdef WITH_FS_RES
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#define APP_DEFAULT_FONT "default_full"
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#endif /*WITH_FS_RES*/
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#include "awtk_main.inc"
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